Thread tension equalizing device



A. J. DESJARDINS THREAD TENSION EQUALIZING DEVICE June 1 1937.

Filed July 24, 1.936

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Patented June 1, 1937 UNITED STATES THREAD TENSION EQUALIZING DEVICEAlfred J.,Desjardins, Manchester, N. H., assignor to GeorgeGreenspan,"New' York, N. Y.

Application July 24,

.6 Claims.

This invention relates to thread tension-equalizing devices.

The general object of the invention is to providean improved device forequalizing the tension on threads or yarns of all types and sizes whichare required to be fed or drawn off under substantially constant tensionin various textile operations.

The invention is particularly beneficial in winding threads from oneform to another; in drawing off of threads from wound bobbins or thelike; for winding, warping, quilling, or in other operations of crepe;and for removing kinks from twisted yarn during operation. The use ofthe invention makes for regularity and consequently results in theproduction of superior fabrics.

It is another object of the invention to provide a device formaintaining under substantially constant tension a thread drawn ofi of aspool, bobbin or the like, regardless of changes in the amount of threadwound upon the spool.

It is another object of the invention to provide a device formaintaining under substantiallyconstant tensionathread or the like drawntherethrough, regardless of the speed .at which the thread is drawntherethrough.

Itis another object of the invention to provide a device for equalizingthe tension of a thread drawn therethrough which holds taut all portionsof the thread-passing through the device during operation,,and which,upon the interruption of operation, takes up the slack which the inertiaof the thread tends to create. Thus, at all times, the'thread is undersubstantially constant tension.

It is another object of the invention to provide a thread tensionequalizing device adapted to produce desired constant tension in yarnsand threads of different weights, sizes and degrees of flexibility. Inprior practice, different devices have been required for differentthreads; and when, during operation, a change'of thread was required, adifferent tension device had to be 5 set up. The present invention, ineliminating the necessity for so changing the tension device results insimpler andmore economical operation.

It is another object of the invention to provide 50 a thread tensionequalizing device which is inexpensive and simple to construct, which iseasily 60 Another feature of the invention resides in the 1936, SerialN0. 92,274:

pro-vision of a thread tension equalizing device having a series ofstationary eyelets and a series of adjustable eyelets, said adjustableeyelets being Weighted.

Anotherfeature of the invention resides in the provision of a threadtension equalizing device having a series of stationary eyelets and aseries of adjustable eyelets, said adjustable eyelets being providedwith means for aligning them with said stationary eyelets, to facilitatethreading of the device.

Other objects, features and advantages'of the invention will be moreapparent from thevfollowing description to be read in connection withthe accompanying drawing in which:

Fig. 1 is a perspective View of a thread'tension equalizing device inaccordance with theinvention, shown in threading position;

Fig. 2 illustrates the device of Fig. 1 in operation; and

Fig. '3 illustrates, on an enlarged scale, one of the adjustableeyelets.

Referring to the drawing, a frame member 2 is provided with a pluralityof stationary eyelets 3 formed in members l extending downwardly fromthe frame member and suitably attached thereto in any desired manner.The members 4 are preferably equally spaced from each other.

The member 2 is provided with a plurality. of

openings 5 formed therein between the stationary members 4. Within theopenings '5 are disposed rods 6, whose diameter is such as to permitfree movement within and through the holes '5. In a preferred form ofthe invention, a pair of holes 5 is provided between each set ofadjacent members 4. Each pair of rods 6 slidably passes through a member1, sustained by nuts 9a, at the lower ends of rods 6. Each member I hasan eyelet '8 and is positioned midway between the members 4 on eitherside thereof. The rods 6 extend through a plate or threading member Inabove the frame member 2 and are provided at their upper extremitieswith nuts or the like 9. The upper side of plate It] is provided with ahandle II.

The members I are so formed that when the handle II is raised, thuslifting the rods 6 and causing the upper portions of members 1 to abutframe member 2, the eyelets 8 will be in alignment with the eyelets 3.Thus, thread I may readily be drawn through the various eyelets 3 and 8of the device by a suitable threading needle or the like. When thedevice has been threaded, the handle II is released and-operation iscommenced.

'The members 1 constitute weights which are free to move up and down onthe rods-'6, and these-members, during operation, continually bob up anddown to provide, automatically, the desired tension in the thread. Thepositions of the members I will vary with the speed of the runningthread or yarn.

Where high speeds are used, it is desirable to thread the yarn throughmost or all of the weighted eyelets of the device. Where, however, lowspeeds are used, the desired control of thread tension may be effectedby threading the thread through a smaller number of weighted eyelets.If, for example, it is desired to employ only one-half of the weightedeyelets, the thread would be threaded in the usual manner through thefirst half of the device; then the hand- II would be lowered and thethread passed through the remaining stationary eyelets without passingthrough the remaining weighted eyelets. Or, if desired, the threadingmember or plate l0 may be formed in two or more sections, each connectedwith one or more of the members 1. By raising the desired number ofmembers 1, the threading may be effected by a single uninterruptedpassage of the threading needle.

When a heavy or relatively stifi yarn is used, a relatively great numberof the weighted eyelets are employed, whereas when a light or readilyflexible yarn is used, fewer weighted eyelets need be employed.

It will be understood, of course, that the size and proportions of thedevice, the number of eyelets and the weight of the weighting elementsmay all vary in designing devices according to the invention fordiiferent types of service. Where very heavy yarns are to be handled,for example, the weights will be relatively heavy; and Where very stiffyarns are to be handled, the eyelets may be spaced further apart thanwhere flexible yarns are to be handled. But each device will have a widerange of applicability and will meet all the requirements of one or moreparticular types of service, despite variations in the speed, weight andflexibility of the running yarn, which can be compensated for bychanging the number of weighted eyelets through which the yarn isthreaded. The invention thus obviates the necessity ror changing fromone tension device to another with a change in yarn or speed, as hashitherto been common practice in the art. Applicant's device is adaptedto give long service before replacement of any of the parts hecomesnecessary; but it is to be noted that practically all of the partsthereof are interchangeable. Thus, replacement, while seldom required,is cheaply and readily accomplished.

To prevent chafing or other injury to the thread drawn through thedevice, the eyelets 3 and 8 are preferably formed of porcelain or othersuitably smooth-surfaced material.

It will be apparent to those skilled in the art that many changes in andmodifications of the invention may be made without departing from thescope thereof. For example, when heavier yarns are handled, auxiliaryweights may be secured in any desired manner to the members I. So also,the plate Ill and handle Il may be dispensed with, without interferingwith or in any way affecting the operation of the device, although insuch case threading of the device would be less simple and quick thanwhen they are employed. The above description and accompanying drawing,therefore, are to be regarded as illustrative only, applicant limitinghimself only as indicated in the appended claims.

I claim:

1. A tension compensating device including a frame member, a series ofstationary eyelets and a series of adjustable eyelets, said eyeletsbeing individually adjustable, said adjustable eyelets being positionedbetween said stationary eyelets and being adapted to move in asubstantially vertical direction, weighting means in combination withsaid adjustable eyelets for producing tension in thread drawn throughthe stationary and through the adjustable eyelets of the device, andmeans in combination with said adjustable eyelets for aligning them withsaid stationary eyelets for threading.

2. A tension compensating device including a frame member, a series ofstationary members having eyelets formed therein, a series of adjustablemembers having eyelets formed therein, said adjustable membersalternating with; said stationary members and being adapted to move in avertical direction, rods associated with said adjustable members, and athreading member in combination with said rods, whereby upward motion ofsaid threading member raises the eyelets of said adjustable members intoalignment with the eyelets of said stationary members, for threading ofthe device.

3. A tension compensating device including a frame member, a series ofstationary eyelets and a series of individually adjustable eyelets, saidadjustable eyelets alternating with said stationary eyelets and beingadapted to move in a vertical direction, and means in combination withat least two of said adjustable eyelets for raising said eyeletstogether into alignment with said stationary eyelets.

4. A tension compensating device including a series of stationarythread-guiding elements, a series of adjustable thread-guiding elements,said adjustable elements alternating with said stationary elements andbeing independently and individually operable, and threading means incombination with said adjustable elements for causing said adjustableelements to assume predetermined positions whenever it is desired tothread the device, whereby threading of the device is facilitated.

5. A tension compensating device including a plurality of stationarythread-guiding elements, a plurality of adjustable thread-guidingelements, at least one of said adjustable elements being operableindependently of at least another of said adjustable elements, andthreading means in combination with said adjustable elements for causingsaid adjustable elements to assume predetermined positions whenever itis desired to thread the device whereby threading of the device isfacilitated.

6. A tension compensating device including a plurality of stationarythread-guiding elements, a plurality of adjustable thread-guidingelements, at least one of said adjustable elements being operableindependently of at least another of said adjustable elements, andthreading means in combination with said adjustable elements for causingsaid adjustable elements to assume predetermined positions whenever itis desired to thread the device whereby threading of the device isfacilitated, said threading means including a threading member and meansfor connecting said threading member with said adjustable elements.

ALFRED J. DESJARDINS.

